Dual scriber



May 5, 1958 l.. J. RENO 2,833,041

DUAL. SCRIBER Filed April 26, 1956 ai f 4f JNVENTOR. 2 /2 l zo J.',ef/vo ATTORNEY United States Patent 2,833,041 DUAL SCRIBER Leo J. Reno,Flint, Mich. Application April 26, l17956, Serial No. 580,802 i 4Claims. (Cl. 33-41) This invention relates to measuring and markingdevices and more particularly pertains to a dual scribing or markingdevice which is capable of easily scribing surfaces which are otherwiseextremely difficult to scribe by using a reference point or line on aneasily accessible surface.

Scribing and marking Vdevices have been employed here tofore tofacilitate accurately scribing in drafting, draw-V ing, machining, andmilling; however, the several devices of the prior art have not provenentirely satisfactory inasmuch as they are complicated in design andconstruction, expensive to manufacture, difficult to use, and are notreadily adaptable for marking substantially unseeable surfaces. f

With the foregoing in view, the primary objectioif the invention is toprovide a marking or scribing devicerwhiclgl is simple in design andconstruction, inexpensive to manufacture, easy to use, and easy to markotherwise diif cult and unseeable surfaces. j j vp Y An object of theinvention is to provide a Vprotractor base having a lscale slidingly androtatably attached thereto which is fixable in an adjustable position, 1A AnY object of the inventionis to providejdualscribing devices whichare linearly and transversely adjustable rel.-

ative toj the scaleiandwhich have pivoted feet for the purposes ofangularly moving the scriber points attached thereto. l

An object of the invention is to provide a center slide between the dualslides for providing an anchor for an adjusting nut and screw secured toone dual scriber for tine adjustment.` j y y These andV othr ,0bjectsofthe invention willbecome apparentA by referencetothe followingdescriptionof. a dual` scribing device embodying the invention taken inconnection Vwith the accompanying drawing in, which:

Figi` is a top plan view of a portion, of the Vslide and scale area ofthe dev,ice.k i;

Fig2 is a side elevational vview Vof, the device seen in Fig. 1. Y

Fig. 3 is a cross-sectional View of Fig.r 1 taken on line 3?-3 thereof.A l Y Fig. 4 is a side elevational view of the device seen in Figs. 1-3in conjunction with a protractor base and shown in relation to scribingsurfaces on a workpiece.

Fig. 5 is a view similar to Fig. 4 showing the device in reversecondition; and

Fig. 6 is a rear elevational view of the scriber foot showing theindices and handle.

Referring now to-the drawing, wherein like numerals refer to like andcorresponding parts throughout the'several views, the scribing andmarking device disclosed therein comprises a scale 10 having dualscribers 11 and 12 slidably mounted thereon, a base and protractor 13for angularly and slidably adjusting and positioning the scale 10, acentering tine adjustment slide 14 mounted on ice More particularly, theprotractor base comprises a base 20 for standing on a lioor 21 or ablock 22 and a protractor element 23 having an annular recess 24 housingthe block 25 which not only grips the protractor element 23 but whichalso includes the slide 10, and the block 25 and the set screw 26 arecapable of holding the pro-- tractor element 23 and the scale 10 in anylinearly or angularly adjusted position. The block 25 has bifurcatedextending ends which include both the element 23 and the scale 10 sothat by tightening the jamming Vset screw 26, the members arefrictionally engaged to prevent relative movement in an adjustedposition. The block 25 is clamped to the protractor 13 by a screw Whoseaxis is radial to the protractor plate 23 as shown in the U. S. patentto Murdock et al. No. 793,602.

The dual Vscriber elements 11 and 12 comprise slide blocks 30 eachhaving a central longitudinal opening 31 forl slidably receiving theVscale 10, a spring 32 disposed between the block 30 and the scale 10 toprovide fric-V 36and. is equipped with a slot 38 which fits over thestud 39 andthe thumb nut et) is adapted toengage the transverse slide 37in fixed adjusted relationship to the slide block 30. The scriber feet41 are pivotally mounted on the bottomof the transverse slides 37 as Vbythe bolts42 and they carry the scriber points 43.

The'center slide disposed between adapted to provide frictional and xedvengagement respect-ively'between the slide blockl 50 and theA scalet10;

the 'block 50 is equippedwith ayoke having dual arms 53 and 54 whichVhavefapertures for receivingzthebolt 55 therethrough which is attachedto the boss 56 mounted onV one of the dualslides 30, and a thumbV nutf57disposed on the bolt 55; it can be seen that by anchoring the slide theadjusting element 15.

50 Via the thumb screw S2 and manipulating the nut 57 that ,the slideblock 11 attached tothe bolt 55 canbe nely adjusted with precision. v. Y

-The protractor is provided with a scale60Ufor"adjustVV ing the angularposition of the scale 10 relative'thereto; the scale is also equippedwith markings 62 for adjusting the' scriber elements 11 and 12 linearlythereof; the slide blocks] 39 are provided witha scfale 64 fortransversely" adjusting the transverse slide blocks 37 relativethereto;v and the feet 4l.A are provided with a scale 63 and a handlel74 for"adjusti ng'the feet angularly of the vtransverse slide bar orelement 37.'

In use or operation, the protractor base 20 is set on a licor 21 orblock 22 and a known mark such as 80 is nely adjusted to the one scriberpoint 43 and then the other scriber point is brought into position so asto mark the workpiece 8l with a mark 82 as seen in Fig. 4.

Fig. 5 illustrates the use of the device in conjunction with an easilyseen mark 83 and it is to be noted that the diicultly seen mark 84 iseasily placed on a workpiece 85 by the other scriber element.

The inventive marking device with these features constitutes a compact,durable, neat appearing mechanism,

easily operated to locate diliicult marks relative to easily seeablemarks as will be appreciated by those skilled in the art.

Although but a single embodiment of the invention has been shown anddescribed in detail, it is obvious that many j me dual Vslides k11v andA12 comprises a slide block 50 slidably mounted ,onV the scale l@ and afriction vspring 51 and thumb screw52` changes may .be made in the size,shape, detail, and arrangement of the various elements of the inventionwithin the scope of the appended claims.

1 A `dual scriber for easily marking otherwise very diicult surfacescomprising a base having a protractor element, a scale rotatably andlslidably mounted relative to said b ase and ixable in any adjustedlinear and angular position, oppositely disposed dual slides slidablydisposed on said scale, springs disposed between said slides and saidscale establishing a displaceable Africtional engage ment between saidslides and said scale, thumb screws on said slides adapted to x saidslides relative to said scale in any adjusted position, walls on eachsaid slide definin g a slideway at a right angle to said scale, a studin each said slideway, cross slides disposed in said slideways eachhaving aslot for receiving said stud, thumbnuts on said studs adapted tosecure said cross-slides relative to said slide in any adjustedposition, feet pivotally mounted on said cross-slides, screws securingsaid feet relative to said cross-slides in any adjusted angularposition, scriber points on said feet, `a center slide on said scalebetween said dual slides, a friction spring between said center slideand said scale,ra thumb screw on said center slide for fixing saidcenter slide relative to said scale, an apertured yoke on said centerslide, a boss on Vone of said dual slides, a bolt fixed on said bossdisposed in said yoke apertures, and a thrust nut disposed in said yokeon said bolt so as to be capable of moving said dual slide attached ltosaid bolt for tine adjustment purposes with said center slide providingan anchor therefore; said protractor base, said scale, saidcross-slides, and said feet being provided with indices and` graduationmarks for determining adjusted positions.

2. A dual scriber for easily marking otherwise very diliicult surfacescomprising a scale, oppositely disposed dual slides slidably disposed onsaid scale, springs disposed between said slides and said scaleestablishing a displace-V able frictional engagement Vbetween saidslides and said scale, thumb screws on said slides adapted to iix saidslides relative to said scale in any adjusted position, walls on eachsaid slide defining a slideway at a right angle to said scale, a stud ineach said slideway, cross-slides dis posed in said slideways each havinga slot for receiving saidstud, thumb nuts on said studs adapted tosecure said cross-slides relative to'said slide in any adjustedposition, feet pivotally mounted on said cross-slides, screws securingsaid feet relative to said cross-slides in any adjusted langularposition, scriber points on said feet, a center slide on saidV scalebetween said dual slides, avfriction spring between said center slideand said scale, a thumb screw on said center slide for fixing saidcenter slide rela-4 tive to said scale, an apertured yoke on said centerslide, a boss on one of saiddual slides, a bolt fixed on said bossdisposed in said yoke apertures, and a thrust nut disposed in said yokeon said bolt so as to be capable of moving said dual slide attached tosaid bolt for tine adjustment purposes with said center slide providingan anchor therefore; said scale, said cross-slides, and said Af eetbeing provided with indices and graduation marks for determiningadjusted positions.

3. A dual scriber for easily marking otherwise very diflicult surfacescomprising a scale, oppositely disposed dual slides slidably disposed onsaid scale, springs disposed between said slides and said scaleestablishing a displaceable frictional engagement between said slidesand Vsaid scale, thumb screws on said slides adapted to tix said slidesrelative to Asaid scale in any adjusted position, walls on each said'slide defining a slideway at a right angle to lsaid scale, a studA ineach said slideway, crossslides disposed in said slideway having a slotfor receiving said stud, thumb nuts on said studs adapted to secure saidcross-slides relative to said slide in any adjusted position, scriberpoints on said cross-slides, said scale and said cross-slides beingprovided with indices and graduation marks for determining adjustedpositions; said scriber points being oppositely disposed for scribingopposed surfaces at the same time.

4. A dual scriber for easily marking otherwise very diflicult surfacescomprising a scale, oppositely disposed dual slides slidably disposed onsaid scale, thumb screws onsaid slides adapted to contact said scaleto xsaid slides relativ'erto said scale in any adjusted position, walls oneach said slide defining a slideway at a right angle to said scale, astud in each said slideway, cross-slides disposed in said slidewayhaving a slot for receiving said stud, thumb nuts on said studs adaptedto secure said cross-slides'relative to said slide in any adjustedposition, feet pivotally mounted on said cross-slides, screws securingsaid feet relative to said cross-slides in any adjusted angularposition, scriber points on said feet, a center slide on said scalebetween said dual slides, a thumb screw on said center slide for xingsaid center slide relative to said scale, an fapertured yoke on saidcenter slide, a boss on one of said dual slides, a bolt tixed on saidboss disposed in said yoke apertures, and a thrust nut disposed in saidyoke on said bolt so as to be capable of moving said dual slide attachedto said bolt for fine adjustment purposes with said center slideproviding an anchor therefore; said scale, said cross-slides, and saidfeet being provided with indices and graduation ,marks for. determiningadjusted positions.

References Cited in the tile of this patent UNITED STATES PATENTS GreatBritain Mar. 24,

